Changes:

• Replaces the fixed participants list in the syncer with the registry
• Updates commonware to 0.0.62 (this removes the unwrap inside of simplex when the current node is not on the committee)
• Adds two e2e tests (deterministic runtime). They are similar to the two tests we already have where we start a set of nodes and then start another node later (with and without a checkpoint). The key difference is that for the new tests, the joining node is not part of the genesis. This tests that the syncer correctly receives updates to the registry and verifies the incoming blocks against the correct version of the registry.